Download Kinetic Energy 3 - Substation PPT #2

What is in a
substation?
What makes substation work?
Parts of a substation
1. Primary power lines
2. Ground wire
3. Overhead lines
7. Current transformer
8. Lightning arrester
9. Main transformer
4. Transformer for measurement of electric voltage
10. Control building
5. Disconnect switch
6. Circuit breaker
11. Security fence
12. Secondary power lines
Primary and Secondary
Power Lines
1. Primary power lines
2. Ground wire
3. Overhead lines
7. Current transformer
8. Lightning arrester
9. Main transformer
Transports
electricity
into
the
substation
at
4. Transformer for measurement of electric voltage
10. Control building
high
voltages
and
out
of
the
substation
at
safe
5. Disconnect switch
11. Security fence
voltages. (Safe for the needs of the
6. Circuit breaker
12. Secondary power lines
community.)
Ground Wire
• What do you think a
“ground wire” does?
Ground wires prevent user
contact with dangerous
voltage if electrical insulation
fails.
Overhead Wires
1. Primary power lines
7. Current transformer
2. Ground wire
8. Lightning arrester
3. Overhead lines
9. Main transformer
4. Transformer for measurement of electric voltage
10. Control building
5. Disconnect switch
6. Circuit breaker
In your own words,
write
11. Security
fence what you
think12.these
do.lines
Secondary power
Transformers
1. Primary power lines
2. Ground wire
3. Overhead lines
7. Current transformer
8. Lightning arrester
9. Main transformer
4. Transformer for measurement of electric voltage
10. Control building
5. Disconnect switch
6. Circuit breaker
11. Security fence
12. Secondary power lines
Transformers
What do you think
Transformers do?
•
Transformers can
be used to vary
the relative
voltage of circuits
or isolate them, or
both.
Transformers
•
Transformer for
measurement of
electric voltage
•
Current transformer
•
Main transformer
Disconnect Switch
• What do you
think a
disconnect
switch does?
In electrical engineering, a
disconnector, disconnect
switch or is used to ensure
that an electrical circuit is
completely de-energised.
Circuit Breaker
•
What do you think
a circuit breaker
does?
A circuit breaker is a manually or
automatically operated electrical
switch designed to protect an
electrical circuit from damage
caused by overload or short
circuit.
Lightning Arrester
•
What do you think a
lightning arrester does?
A lightning arrester is a device used on electrical power
systems and telecommunications systems to protect the
insulation and conductors of the system from the
damaging effects of lightning. The typical lightning
arrester has a high-voltage terminal and a ground
terminal. When a lightning surge (or switching surge,
which is very similar) travels along the power line to the
arrester, the current from the surge is diverted through the
arrestor, in most cases to earth.
Control Building and
Security Fence
1. Primary power lines
7. Current transformer
2. Ground wire
8. Lightning arrester
3. Overhead lines
9. Main transformer
4. Transformer for measurement of electric voltage
10. Control building
5. Disconnect switch
6. Circuit breaker
In your own words,
write
11. Security
fence what you
think12.these
do.lines
Secondary power
Can you list the parts
of a substation and
say what they do?